A decreasing-cost industry is one in which firms experience higher; contracts costs as their industry lower; expands.
An industry with declining costs can be identified by its long-term supply curve, which slopes downward. In this situation, product prices would often decrease as a result of decreasing manufacturing costs when a rise in market demand prompts additional output to match that demand.
We have a growing cost supply curve for the industry over time when individual supplier costs rise as industry output increases. On the other hand, we have a declining cost industry when the prices of individual suppliers decrease together with the size of the industry.
A perfectly competitive sector with a long-term supply curve that is negatively sloped as a result of the sector's expansion driving down costs of production and resource costs.
Hence, A decreasing-cost industry is one in which firms experience higher; contracts costs as their industry lower; expands.
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